On Mon, 04 May 2020 10:48:46 +0200, Sameer Pujar wrote: > > > > On 5/4/2020 2:05 PM, Sameer Pujar wrote: > > > > > > On 5/4/2020 1:59 PM, Takashi Iwai wrote: > >> External email: Use caution opening links or attachments > >> > >> > >> On Mon, 04 May 2020 10:16:13 +0200, > >> Sameer Pujar wrote: > >>> This series proposes SW workarounds for Tegra194 HDA HW bugs. > >>> Following are the two issues seen: > >>> 1. GCAP register does not reflect true capability. > >>> The actual number of SDO lines is "4", where as it reflects "2". > >>> 2. With 4 SDO line configuration playback fails for, > >>> 44.1K/48K, 2-channel, 16-bps audio stream. > >>> > >>> After fixing [1], issue [2] is uncovered. > >>> As per recommendation by Tegra HW team the workarounds are pushed. > >>> > >>> Testing done > >>> ============ > >>> * Verify GCAP register after registering HDA sound card > >>> * Verify audio playback for 44.1K/48K, 2-channel, 16-bps. > >>> > >>> Sameer Pujar (3): > >>> ALSA: hda/tegra: correct number of SDO lines for Tegra194 > >>> ALSA: hda: add member to store ratio for stripe control > >>> ALSA: hda/tegra: workaround playback failure on Tegra194 > >> Through a quick glance, all changes look good. > >> > >> Is the device already in market, i.e. it had hit users? If yes, I'm > >> going to merge for 5.7, otherwise for 5.8. > > > > Yes the device is in the market. But has not been reported by end users. > > During internal resting this has been discovered. I am fine with > > merging this to 5.8. > > To add, end users currently won't see this problem because things work > fine with 2-SDO lines. The issue is seen when Tegra194 is allowed to > utilize its actual capability of 4-SDO lines. Thanks for the information. Then I queued all three patches now to for-next branch destined for 5.8. Takashi
